That's right, the Lock Top damper seals with a rubber gasket, not metal to metal like
your current damper. A Lock-Top Damper seals tight, so virtually no air, and
thus no heat or air conditioning gets lost up your chimney.

The Lock Top also eliminates downdrafts, seals out rain which can deteriorate
the inside of your chimney, and prevents entry by pests like squirrels,
raccoons, and nesting birds.

The Lyemance Lock Top Chimney Damper mounts on top of your chimney

A cable drops down your flue and attaches to a handle which mounts where you can
reach it for convenient opening and closing.

Superior stainless steel and cast-aluminum construction equal a lifetime
warranty
The Lock-Top Damper is made of cast-aluminum and stainless steel, precision
fitted with our special silicone rubber gasket. These high-quality materials add
up to a factory lifetime warranty for you.

Volko Supply is recognized as a leading distributor for Lyemance & Lock Top
top sealing chimney dampers.

What is STAINLESS STEEL?
Stainless steel is a family of iron based alloys that must contain at least
10.5% CHROMIUM (Cr). The presence of chromium creates an invisible surface film
that resists oxidation and makes the material "passive" or corrosion resistant
(i.e. "stainless").

Grading Stainless Steel. As a percentage, the first number is the amount of chromium
that is contained in the stainless i.e. 18 is 18% chromium. The second number is
the amount of nickel i.e. 8 stands for 8% nickel. So 18/8 means that this
stainless steel contains 18% chromium and 8% nickel. This is a common name for
Type 304 Stainless. The higher the numbers the more corrosion resistant
the material. I wonder how much money was actually saved to make these
"other" caps?

Here are some of the
advantages of using Lyemance brand dampers:

Proven by being in the
industry for over 20 years for the Lyemance damper and over 15 years for
the LockTop damper.

Continually tested by an
outside lab to ensure functionality and seal tightness.

The best materials chosen for
each part/component on the product.

Power-lever on Lyemance damper
is proven to open damper in extreme snow/icing conditions.

Backed by a company that has
been around for over 25 years.

Patented product.

Both have a consistent rubber
gasket seal that seals the damper base to the lid like a canning jar.
Others may have an injected seal that is usually not consistent in
creating a tight seal.